{"id":"CVE-2026-31620","state":"PUBLISHED","title":"ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usx2y: us144mkii: fix NULL deref on missing interface 0\n\nA malicious USB device with the TASCAM US-144MKII device id can have a\nconfiguration containing bInterfaceNumber=1 but no interface 0.  USB\nconfiguration descriptors are not required to assign interface numbers\nsequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will\nthen be dereferenced directly.\n\nFix this up by checking the return value properly.","publishedAt":"2026-04-24T14:42:38.607Z","updatedAt":"2026-06-14T17:43:06.553Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"09b145c1f1331c40dc955c0024d636f25417cddb","versionType":"git"},{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602","versionType":"git"},{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"d04dd67ab10dc978c6c843c6bd6a2a66a9444f51","versionType":"git"},{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"48bd344e1040b9f2eb512be73c13f5db83efc191","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/usx2y/us144mkii.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/usx2y/us144mkii.c"]}],"references":["https://git.kernel.org/stable/c/09b145c1f1331c40dc955c0024d636f25417cddb","https://git.kernel.org/stable/c/fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602","https://git.kernel.org/stable/c/d04dd67ab10dc978c6c843c6bd6a2a66a9444f51","https://git.kernel.org/stable/c/48bd344e1040b9f2eb512be73c13f5db83efc191"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31620.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31620","state":"PUBLISHED","datePublished":"2026-04-24T14:42:38.607Z","dateUpdated":"2026-06-14T17:43:06.553Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.123Z"},"containers":{"cna":{"title":"ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usx2y: us144mkii: fix NULL deref on missing interface 0\n\nA malicious USB device with the TASCAM US-144MKII device id can have a\nconfiguration containing bInterfaceNumber=1 but no interface 0.  USB\nconfiguration descriptors are not required to assign interface numbers\nsequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will\nthen be dereferenced directly.\n\nFix this up by checking the return value properly."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"09b145c1f1331c40dc955c0024d636f25417cddb","versionType":"git"},{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602","versionType":"git"},{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"d04dd67ab10dc978c6c843c6bd6a2a66a9444f51","versionType":"git"},{"version":"dee1bcf28a3dd13ddb2e9200407864f73e9c4d63","status":"affected","lessThan":"48bd344e1040b9f2eb512be73c13f5db83efc191","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/usx2y/us144mkii.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/usx2y/us144mkii.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/09b145c1f1331c40dc955c0024d636f25417cddb"},{"url":"https://git.kernel.org/stable/c/fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602"},{"url":"https://git.kernel.org/stable/c/d04dd67ab10dc978c6c843c6bd6a2a66a9444f51"},{"url":"https://git.kernel.org/stable/c/48bd344e1040b9f2eb512be73c13f5db83efc191"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:43:06.553Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}